Since the mid-1990s, the US has built fencing at various points along the southern border in an attempt to deter would-be immigrants from Mexico. Building the fence isn't cheap. On average, each mile of border fence costs US taxpayers about $4 million to build and will cost another $6.5 billion over the next 20 years to repair and maintain. But is the border fence an effective deterrent or a waste of taxpayer money? To find out, I asked two American women to see if they could climb the wall.